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hemicellulose Syllabification: hem·i·cel·lu·lose
Pronunciation: /ˌheməˈselyəlōz/

Definition of hemicellulose in English:


Any of a class of substances that occur as constituents of the cell walls of plants and are polysaccharides of simpler structure than cellulose.
Example sentences
  • Plant cell walls are composed primarily of cellulose microfibrils, hemicelluloses, pectic polysaccharides, and small amounts of structural proteins.
  • Dietary fibre consists of plant material such as cellulose, hemicellulose, pectin, polysaccharides, gums, mucilage and lignin.
  • Pectins and hemicelluloses, two of the major cell wall components, undergo solubilization and depolymerization.


Late 19th century: coined in German from hemi- + cellulose.

Definition of hemicellulose in:
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